81940040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{22511}}^1$

素因数の和:22542

約数の個数: 64

約数和(自身を含む): 226920960

約数和(自身を除く): 144980920

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 22511, 45022, 90044, 112555, 157577, 180088, 225110, 292643, 315154, 450220, 585286, 630308, 787885, 900440, 1170572, 1260616, 1463215, 1575770, 2048501, 2341144, 2926430, 3151540, 4097002, 5852860, 6303080, 8194004, 10242505, 11705720, 16388008, 20485010, 40970020, 81940040]

約数ペア:

[(1, 81940040), (2, 40970020), (4, 20485010), (5, 16388008), (7, 11705720), (8, 10242505), (10, 8194004), (13, 6303080), (14, 5852860), (20, 4097002), (26, 3151540), (28, 2926430), (35, 2341144), (40, 2048501), (52, 1575770), (56, 1463215), (65, 1260616), (70, 1170572), (91, 900440), (104, 787885), (130, 630308), (140, 585286), (182, 450220), (260, 315154), (280, 292643), (364, 225110), (455, 180088), (520, 157577), (728, 112555), (910, 90044), (1820, 45022), (3640, 22511)]